Professional disc-type16 1/4" tester is accurate at all temperatures. Tests ethylene glycol based coolant, hot or cold, including Dex-Cool®. Easy to read discs are magnified by convex design of the clear SAN plastic barrel. Celsius and Fahrenheit scales. Special feature is the "6th disc" which shows overprotection and a loss of cooling efficiency. Beyond 70% anti-freeze, cooling & corrosion effectiveness is reduced. One-piece bulb and neoprene dip tube.

Large 16-1/4" professional disc-type tester is accurate down to -40° F. Full size tester uses specific gravity and the number of floating discs to show state of charge. Accurate at all temperatures. Specific gravity levels are printed on the tough, see-through plastic body. Has one-piece rubber bulb, neoprene tip.

The DEF-TESTER is designed to test the urea concentration of Diesel Exhaust Fluid. Professional disc-type16 1/4" tester is accurate at all temperatures. Easy to read discs are magnified by convex design of the clear SAN plastic barrel. One-piece bulb and neoprene dip tube.

Allows technician to test for current drain caused by control modules, computers or other solid state devices. Attaches in-line to negative battery terminal and cable. Current drain is read by connecting ammeter across tester. Used on all computer controlled vehicles since 1980. Eliminates the "shot-gun" method of replacing suspected components. Fits both side terminal and top post batteries. Plated for excellent conductivity.

Adjustable spark gap to determine strength of coil on most small engine applications.Designed for use on small engines with and without batteries; third pin is for magneto systems on small engines.Highlighted marks at 4 & 6mm for most common start and end locations.Spark plug end fits securely onto spark plug for better connection than alligator clip. Can be used for both in-line and grounded testing.▫ Separate grounding clip included in kit.Scale is in millimeter increments which is mostly a small engine reading.Fully insulated for shock resistance.Made in USAPatent pending